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Finding the Fourth Proportional to 152.08, 208.63 and 142.76

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Solution

The fourth proportional to 152.08, 208.63 and 142.76 is: 195.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    152.08 : 208.63 = 142.76 : x
  2. Step 2: Convert to fraction form
    152.08/208.63 = 142.76/x
  3. Step 3: Cross multiply
    152.08x = 208.63 × 142.76
  4. Step 4: Simplify right side
    152.08x = 29,783.92
  5. Step 5: Solve for x
    x = 29,783.92/152.08
  6. Step 6: Final answer
    x = 195.85

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.